/*
 *              Copyright (C) 2011 The MusicMod Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *            http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.musicmod.android.utils;

import android.database.Cursor;
import android.provider.MediaStore;
import android.widget.AlphabetIndexer;

/**
 * Handles comparisons in a different way because the Album, Song and Artist
 * name are stripped of some prefixes such as "a", "an", "the" and some symbols.
 */
public class MusicAlphabetIndexer extends AlphabetIndexer {

	public MusicAlphabetIndexer(Cursor cursor, int sortedColumnIndex,
			CharSequence alphabet) {
		super(cursor, sortedColumnIndex, alphabet);
	}

	@Override
	protected int compare(String word, String letter) {
		String wordKey = MediaStore.Audio.keyFor(word);
		String letterKey = MediaStore.Audio.keyFor(letter);
		if (wordKey.startsWith(letter)) {
			return 0;
		} else {
			return wordKey.compareTo(letterKey);
		}
	}
}
